Draft promoter for furnaces



Feb. 8, 1938. A. A. REA 2,107,504

DRAFT PROMOTER FOR FURNACES FilEd 061;. 9, 1936 5 Sheets-Sheei 1 Aiiomqeys Feb. 8, i938.

A. A. REA

DRAFT PROMOTER FOR FURNACES Filed 001.. 9, 1956 3 Sheets-Sheet 2 Feb, 8, 1938. A REA 2,107,504

DRAFT PROMOTER FOR FURNACES Filed Oct. 9, 1936 5 Sheets-Sheet 5 Aiiorneys Patented F eb. 8, 1938 UNITED STATES PATENT OFFICE DRAFT PROMOTER FOR FURNACES Arthur A. Rea, La Grande, Oreg. Application October 9, 1936, Serial No. 104,884

1 Claim.

This invention appertains to a blower for furnace constructions, and more particularly to a furnace of the hot air type. r

The principal object of the invention is to 5 provide a blower for a hot air furnace wherein means is provided for circulating the hot air under force.

Another important object of the invention is to provide a blower for a hot air furnace where- 10 in hot air can be delivered under force through the agency of means which will not cost much to install on conventional hot air furnaces.

These and various other important objects and advantages of the invention will become appar- 15 ent to the reader of the following specification.

In the drawings:

Figure 1 represents a top plan view of the furnace.

Fig. 2 represents a bottomplan view of the 20 dome with the blower therein.

Fig. 3 represents a vertical sectional view through the furnace.

Fig. 4 represents a side elevational view of the rotor.

5 Fig. 5 represents a perspective view of the blade carrier of the rotor.

Fig. 6 represents a vertical through the rotor spider.

Referring to the drawings wherein like nu- 30 merals designate like parts, it can be seen in r Fig. 3, that numeral 5 represents generally a furnace which consists of the fire box 6, the ash box 1 and the heating drum 8. Spatially disposed around the furnace structure 5 is the shell 35 9 which has'the air inlet conduit I at its lower end.

The top of the shell 9 is provided with the dome l l which is provided with side wall portions l2 and a depending apron I 3 which rests upon 40 the upper edge of the shell 9. An inwardly curved flange i4 is provided on the inside of the apron 13 so as to direct Warm air passing upwardly above the drum 8 toward the inverted conical shaped rotor I through the apex of which the shaft 16 is disposed. The shaft l6 extends downwardly through the dome H and is supported in this position by the bearing l1. Jamb nuts or the like l8 above and below the apex portion of the sectional view rotor l5 serve to retain the rotor in proper position on the shaft.

The dome H is provided with outlets l9 to hich pipes can be connected and through which air can be supplied to the various parts of a 5 building.

As shown in Fig. 6, numeral 20 generally refers to a spider which consists of a plurality of radially disposed arms 2| radiating from a common central point 22 and are provided with suitable openings 23 whereby the arms can be riveted to the bottom side of the conical-shaped rotor so as to reinforce the same.

Elongated transversely curved blades 24 are secured to the bottom side of the rotor l5 and 15 these blades increase in thickness outwardly in proportion to the pitch of the rotor l5.

Thus it can be seen, that when the motor 25 which is located on the top of the dome H is started, the belt 26 which is driven by a pulley of the motor and is trained over the pulley I! on the shaft l6, will drive the shaft l6 and rotor l5 so that the blades 24 will effect a pull and draw air upwardly through the shell 9 and force the same outwardly through the openings l9 into the various conduits of the hot air system.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerouschanges in the shape, size and materials may be resorted to without de- 3 parting from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:-

A draft promoter comprising a rotor, said rotor being of inverted conical shape, a frame structure having diverged arm portions, means for securing the frame to the bottom side of the rotor, blades secured to the bottom side of the rotor, said means for securing the frame to the rotor and also serving to secure the blades to the rotor, the central portion of the said frame crossing the apex portion of the rotor, a shaft provided with bearing means and having its lower ends secured both to the apex and central portions of the rotor and frame respectively, and means at the upper end of the shaft to rotate said rotor.

ARTHUR A. REA. 

